rtpsw commented on code in PR #35953:
URL: https://github.com/apache/arrow/pull/35953#discussion_r1228648531
##########
cpp/src/arrow/util/thread_pool.h:
##########
@@ -301,8 +301,10 @@ class ARROW_EXPORT SerialExecutor : public Executor {
/// approach is to use a stop token to cause the generator to exhaust early.
template <typename T>
static Iterator<T> IterateGenerator(
- internal::FnOnce<Result<std::function<Future<T>()>>(Executor*)>
initial_task) {
+ internal::FnOnce<Result<std::function<Future<T>()>>(Executor*)>
initial_task,
+ internal::SerialExecutor** serial_executor_out = NULLPTR) {
Review Comment:
The `StopProducing` approach ([noted
here](https://github.com/apache/arrow/pull/35953/#issuecomment-1589892510))
worked in an internal experiment. Side note: the pre-PR version also had a call
to `StopProducing`, in the destructor of `BatchConverter`, but it was too late
- a hang happens earlier.
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